Albert g



@auch gister strltt @ffice ALBERT Gr.` SMITH, OF CLEVELAND, OHIO.

' Leffe-s Page@ No. 66,745, ma July 16, 1867.

IMPROVED TRENGHING AND HOISTING APPARATUS.

T0 ALL WHOM IT MAY. CONOERN:

Be it know-n `that I, 'ALBERT G. SMITH, of Cleveland, in the county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Hoisting Apparatus for Trenching; and I do hereby declare that the following'is a full and complete description of the same, reference being had to lthe accompanying drawings', making a part of this specification, in which- Figure l is a side view of the machine.

Figure 2 is a top view. I l

Figure 3,1m end view:

Like letters refer to like parts in the different views. Y

This apparatus consists of the horizontal frame A' and the supplementary vertical frame B, stayed by thebraces C. The cranes D E are placed in and supported 4by the frame B, whereas .the crane Fis secured to the shaft G, and swings ever the top of the frame. From the extremity of each crane is suspended` a bucket, H, which-is raised and lowered by the pulley I and ropes J, one end of 'the ropes being ixedA to the end of the crane, passing thence through ythe sheave K over the arms of the crane, through whichthey pass down over sheaves to the windlass L, and on which they are wound' up, and thefbuckets thereby elevated, as will hereafter be shown.A It will be observed that there are two sets of, pulleys on the shaft, constituting the windlass a a. a', on which the ropes are wound, is adjustable or loose upon the shaft, whereas a is fixed or rigid. A section of eachside of each pulley is cut away, leaving a shoulder, b, fig. 2. These shoulders form a clutch, by means of whiclit-he rigid vpulleyscarry thefree one when the two are made to engage. In the periphery of each`free pulley are cut notches or teeth, into which the pawls M fall as the 4rope is being wound up, and thereby preventing any unexpected back action of the windlass; also to retain the buckets when elevated. The bail of the bucket is hinged at the middle in order tofacilitate itsv tilting for discharging its contents. Across the bottom os thc bucket is a stay, c, one end of which is hinged to the side at tbe point rv, and the other terminates in a hook, e, up the side, and to which the rope N is attached, which reaches from thence up through the arm of the crane, passing over sheaves K along the arm, thence down through the same toward the ground, or into the trench over which the machine stands, and to the dependent ends of which are attached the weights P, for the purpose of keeping taut the ropes as the buckets are being raised by the ropes J and windlass.

Having thus indicated the several parts of the apparatus, the operation of the same is as follows:

The machine is placed over the trench or line of work, so as to bring the extended arms of the cranes in'line with the ditch: The buckets are then lowered into it and filled. When lled they are raised from' the trench by throwing the free pulley of the windlass into connection vwith the fixed one, and the ropes are thereby wound up and the buckets raisedfrom the trench to the bank. The 'several cranes are then swung around, carrying the several buckets over the bank. They arethcn tilted over and their contents discharged by pulling the ropes N to which the strap c `is attached. This strap being hinged to the side of 'the bucket, as above said, causesit to become inverted without allowing it to turn completely over, and thusthe dirt is wholly emptied along either side of the trench, as before remarked. -The pulleys a are then disengaged from the rigid ones, and the buckets lowered into the trench to be again filled, and the operation of raising and emptying repeated. This apparatus being placed on rollers Q, can be easily moved along as the work progresses, dilfering in this respect from an ordinary derrick, as the latter cannot b e moved without much-v labor, by detaching the guy ropes and taking it down for that purpose, whereas this machine is self-sustaining, it also being arranged with two sets of arms or cranes. Two gangs of hands can be employed at once, and thus the Work of trenching greatly expedited, or a less number of buckets can be used without making any change in the condition of the machinery. V

The advantages Yof this machine consist in the saving of labor, the expense of scaffolding, and the employ ment of' a less number of hands. In tbeordinary manner of ditching it is found necessary, when the W014i has been sunk to any considerable depth, to vbuild staging, upon whichthe lower gang of workmen throw the dirt, the bank being too high for them to throw it out, hence it involves the expense of another set of Workmen to throw the dirt from the scaiblding out upon the bank as fast as the lower workmen muy throw it'up'on it. By

the use of this apparatus this extra labor and number of hands andv expense of'scaffolding are saved, and the work accomplished more expeditiously and with greater facility. 'V i What I claim as my improvement, and desire to secure by Letters Patent, isf l. The buckets H, provided with the tilting straps c, when arranged and operated conjointly by the pulleys I, ropes J and N, cranes D E F, and windlass L, as and for the purpose set forth.

2. The pulleys a a', pawls M, as arranged and operating conjointlj7 and in combination with the cranes D E F and buckets H, in the manner and for the purpose described.

3. The cranes D E F, in combination with the frames A B and rollers Q, for the purpose and in the 'manner set forth. l

4. The combination of the movable frame with one or mere cranes-and hoisting apparatus, so arranged over the ditch or channel vbeing excavated that the cranes and hoisting apparatusv will be seltsustaining with said frame, when operating conjointly in the manner and for the purpose set forth. p

' Y ALBERT G. SMITH.

Witnesses W. H. BURRIDGE, E. E. Warm. 

